I've been using the Cadence rate monitor for rowing since it came out a few years ago. See http://cadencerowing.com The new version is like a watch and measures ratings up to 150 strokes per minute. Sounds like it could be used to measure cadence in xc-skiing.

Has anyone tried using this for xc skiing? I've tried strapping the old version to my wrist and waving it to simulate the xc ski stroke. That works, except that it has rating only up to 60 spm.